connetc instance from dashboard by novncproxy failed

dear all, i have a question that i cannot connect an instance from dashboard by novncproxy.

i cannot connect the instance from dashboard. I have 11 machines to build the cloud.keystone,glance,dashboard,mysql and nova were installed on the controller(192.168.80.10/192.168.78.10) . And glance ,nova are also are installed other machines.
my question is that nova-consoleauth is needed to install on every machine???